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7-((4*x)/5) = -7 // + 7
7-((4*x)/5)+7 = 0
(-4/5)*x+7+7 = 0
14-4/5*x = 0 // - 14
-4/5*x = -14 // : -4/5
x = -14/(-4/5)
x = 35/2
x = 35/2
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